You stated that your time of birth is 23:50 , just deduct 4 minutes and your lagan chances to Aquarius and most importantly you are not mangalik. Which is a big consideration when you are thinking of getting married. With Pisces sign as Lagan your chart is very weak for marriage. Venus the karka is combust, strong mangal dosha, 7th lord with Rahu do not promise marital happiness. A 4 minutes difference in the time of birth can be there it is very normal and as you are born in the Cusp, it will make a lot of difference in your life. So the best would be to check the traits of Pisces and also of Aquarius and see which ones suits you the most. In terms of your life, your personality , your social circle, family etc. It may take some time but will certainly help you in the long run in taking the correct decisions in your life.
Regarding the Stones well I disagree with wearing Red Corel as Mars in 8th house indicate accidents and surgery and we don’t need to strengthen that. Yellow Sapphire is the stone for Jupiter and Jupiter is the lagan lord if you take 23:50 at your time of birth. Wearing Yellow Sapphire would bring you benefits in any of the time you choose as with Aquarius lagan Jupiter is the lord of 2nd and 11th house which is the Dhanbhav and house of gains respectively.
Blessings,
Navneet Khanna
Astrologer